FIELD: physics.
SUBSTANCE: novel in the method of detecting underwater ferromagnetic objects is the detection of mechanical vibrations in said objects due to the effect of magnetic field from an ungrounded current-conducting magnetising loop connected to its own power supply and then picking up said vibrations using a hydroacoustic receiver. To reduce the noise effect of natural sonar noise on the search process, a contactless vibrometer is used, which exposes the ferromagnetic object to a probing physical field which penetrates through water (hydroacoustic, laser radiation in the blue-green spectrum, and in fresh water - high-frequency electromagnetic field). A device for realising the method is also disclosed.
EFFECT: faster search for underwater ferromagnetic objects and high safety of work when removing mines from water bodies.
4 cl, 1 dwg
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Authors
Dates
2012-03-10—Published
2009-12-18—Filed